Improvement in the manufacture of pottery-ware



ISAAC W. KNOWLES, OF EAST LIVERPOOL, OHIO.

Letters Patent No. 108,157, dated October 11, 1870.

IMPROVEMENT IN Tl-IE MANUFACTURE OF POTTERY-WARE.

The Schedule referred to in these Letters Patent and making part of the same To all whom 'it may concern:

Be it known that I, Isaac W. Kivownns, of East Liverpool, in thc county of Columbiana, and State of Ohio, have invented anew and useful Improvement in Machine for Holding and Operating Rib- Handles in Manufacture ot Earthen-XVare; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying di'awing making a part ot' this specification, which represents a side elevation of my improved machine.

Iii the manufacture of pottery-ware, a rapidly-revolving table or machine called a jiggen is usually employed, on which is tixed the mold which is to shape the outer surface of the article to be made.

On this mold the plastic material is placed, and the desired inner shape is given by means of interchangeable formers oi ribs, attached to a lever or rib-handle, one end of the lever being pivoted, a-iid the other being operated by the workman.

The pivoted end of suoli rib-handle has also been slotted, so the workman, by pushing the rib-handle and ribirom him, could form an outward bulge below the mouth of the article to be made. The labor attending this operation is exceedingly severe.

Such machines are seriously detective, in that they contain no device for regulating the thickness of the article to be made, neither in its bottom or fiat part, nor in its raised sides or edges. The result is, that the work produced even by the same workman, is often lacking in uniformity, and much ot' it is worthless.

The object of my invention is to obviate these defects, and this is accomplished by the use of a socketed head for the insertion of the rib-handle, such head being pivoted in slotted bearings at a point below or outside of the socket into which the rib-handle is to be inserted, and also having aset-screw, or other equivalent adjusting device, to aid in fixing the length ot' the downward thrust of the rib.

I also provide for lengthening and shortening the length of the slots in which the bearings of the socketed` head operate, and thereby the better regulate the length of the backward push or throw of the rib.

To enable others skilled in the art to make and use my improvement, I will proceed to describe its construction and mode of operation.

On any suitable foundation, a,- I fasten, by bolts or otherwise, two cheek-plates, one of which is shown at l1, the other, on the opposite side, being in all respects -its counterpart.

In each of the cheek-plates b, and opposite to each other, is a slotted hole or recess, c, of any desired length.

In the slots c, the bearings oi' trnnnions d' of the liead-block d are placed.

The head-block d, the outline of which is shown by dotted lines in the drawing, operates between thc cheek-plates b, and carries a socket or box, e, lixedly attached thereto, into which is inserted the rib-handle f, the handle being heldin place therein at the de sired point of adjustment, by means ,of a set-screw, c, which bears against a plate of metal interposed between the socket or box c, and the rib-handle f.

rIhe rib f is attached to the rib-handle f in the usual or any known way, the handles and ribs being interchangeable for making different sizes and patterns of ware.

The cheek-plates l1 extend up above the socket or box' c, as at'lz', so as to supporta stopblock, g.

From the rear end of t-lie box c, an arm, 7i, extends up back of the stop-block y, so as to limit the length ot' fall or downward thrust of the rib f', nd this length of fall call be made variable by means ot a set-sc1'ew, 7i', the inner end of which sensoreny bears against the stop-block g.

The revolving table or jigger and mold are ai" ranged under theribf in the usual way.

I prefer to make the slots c inclining downward a very little toward their forward end, though it is not absolutely necessary.

As the workman wishes to work outward, he `niani'pulates the handle f so as to cause the bearin gs d' to travel or slide back slowly along the slots c, whereby the ribf is also caused to travel outward. The length of this backward motion of the bearings fl may be regulated, if so desired, by means of slides in, adjustable by set-screws n, so arranged that the for wai'd ends of the slides shall practically lengthen or shorten the slots c.

It will now be observed that, with the pivotingpoint of the head-block d arrangedas described, 'that is, below the inside of the box e, the machine is of utility in the manufactue of articles which bulge outwardly below the month. The bulge is made by giv-` ing a backward motion to the rib f', which is done by continuing the downward pressure. The rib can be withdrawn through a comparatively small mouth, since, from its relation to the center of motion, it will pass out almost, if not quite exactly in the axial line of the mouth. Consequently, I am enabled to manufacture articles having a larger' bulge, as compared with the diameter of the mouth, than can be made by the machines heretofore in use. work more perfect and uniforn1, with less loss from imperfect jobs, and at a greatly reduced cost for skilled labor.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In machines constructed for the manufacture ot earthen-ware, t-lie combination of the socket or box c,

I also secure` pivoted below its lower fame, as ai; d', and removable handle f, pxovided with the operating rib f', substantially as and for the purpose set forth.

2. In combination with the socket of box e, and trunnionsd', the slots c and A:ildjuslizmble slides on, for determining the length of such slots, substantially as described. 3. In combination with the socket or box e, piv

oted as set forth, the set-screw h', or equivalent ad- VVituesses W. N. PAxToN, G. H. CHRISTY. 

